Patents by Inventor SaiRamesh Nammi

SaiRamesh Nammi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210226731
    Abstract: Facilitating uplink control channel decoding for advanced networks (e.g., 4G, 5G, and beyond) is provided herein. Operations of a system can comprise determining a channel estimate for an uplink control transmission received from a user equipment device via an uplink control channel, wherein the determining is based on a reference signal received from the user equipment device. The operations also can comprise determining a status of an acknowledgement that a data transmission was received by the user equipment device based on the channel estimate and a maximum likelihood estimation function.
    Type: Application
    Filed: April 9, 2021
    Publication date: July 22, 2021
    Inventor: SaiRamesh Nammi
  • Patent number: 11070254
    Abstract: Described is a technology to reduce the interference between two or more transmit receive (Tx/Rx) points (TRPs) and improve the reliability for New Radio ultra reliable low latency communication (NR URLLC) applications. The technology operates in one aspect at a network node, and in another aspect at a user equipment. If a network device decides to use packet duplication, the network device can indicate duplication to the user equipment. The network device can send duplicate copies, e.g., via two different antenna panels, or can send one copy and coordinate with another network device (e.g., another cell) to send the other copy. When the user equipment receives the copies, the user equipment combines the data, e.g., via soft combining or concatenation into combined data, and decodes the combined data. Weights, such as corresponding to channel quality from each transmit source, can be used as factors in the combining of the data.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: July 20, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: SaiRamesh Nammi, Arunabha Ghosh
  • Patent number: 11070405
    Abstract: Facilitating the reduction and/or mitigation of spatial emissions in a multi antenna wireless communications system is provided herein. A system can comprise a memory that stores executable instructions that, when executed by a processor, facilitate performance of operations that can comprise applying a first signal linearization to a first output signal of a first power amplifier based on a determination that an adjacent channel leakage ratio of the first output signal of the first power amplifier fails to satisfy a defined output value. The operations can also comprise applying a second signal linearization to a group of output signals of a group of power amplifiers for a defined azimuth direction associated with channel frequencies of the group of output signals and applying a third signal linearization to the group of output signals for a defined elevation direction associated with the channel frequencies of the group of output signals.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: July 20, 2021
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: SaiRamesh Nammi, Arunabha Ghosh
  • Publication number: 20210218490
    Abstract: The gains with non-orthogonal multiple access (NOMA) for uplink data transmissions can be high when chosen codes are orthogonal. However, when codes are non-orthogonal, the gains can be low. NOMA can be used when there is more than one mobile device using the same resources. Since orthogonal codes cannot be possible for every length, codes which have low cross-correlation properties can be used. However, when there are a large number of mobile devices using the same resources, the cross-correlation between the codes can cause interference to the mobile devices. Reducing the gains of a NOMA system can reduce the overall throughput. Thus, transmitting data on the same resources in a NOMA can occur in spite of the interference to the UEs transmitting data on the same resources. Therefore, a non-orthogonal multiple access design for a 5G network can mitigate interference.
    Type: Application
    Filed: March 31, 2021
    Publication date: July 15, 2021
    Inventors: SaiRamesh Nammi, Arunabha Ghosh, Saeed Ghassemzadeh
  • Patent number: 11063729
    Abstract: Various embodiments disclosed herein provide for switching between non-orthogonal and orthogonal multiple access protocols dynamically. A base station device can determine whether a user equipment device on a communication link should use a non-orthogonal multiple access system or an orthogonal multiple access system based on one or more attributes of the communication link, and send an indication of the selection to the user equipment device. The base station device can indicate the selection using a spreading factor parameter that is either equal to one or greater than one. If the spreading factor parameter is equal to one, that can indicate to the user equipment device to use an orthogonal multiple access system, whereas if the spreading factor parameter is greater than one, that can indicate to the user equipment device to use a non-orthogonal multiple access system.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: July 13, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: SaiRamesh Nammi, Saeed Ghassemzadeh, Arunabha Ghosh
  • Patent number: 11057794
    Abstract: An adaptive downlink control channel structure is utilized for control channel transmission for 5G and other next generation wireless systems. Moreover, the adaptive downlink control channel structure can utilize a reduced length/size to decrease signaling overhead for each transport block. In an aspect, a first downlink control channel structure for a data transmission can be utilized to implicitly indicate redundancy version (RV) and a second downlink control channel structure for a subsequent data transmission can be utilized to explicitly indicate the RV. In another aspect, the RV can be indicative via an adaptive bit load. Further, in yet another aspect, the RV can be indicated based on a joint encoding of RV and new data indicator (NDI) information.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: July 6, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: SaiRamesh Nammi, Ralf Bendlin, Arunabha Ghosh
  • Patent number: 11057092
    Abstract: Fast calculation of channel state information using demodulation reference signals (DM-RS) is provided herein. Channel state information is traditionally calculated based on the channel state reference signals (CS-RS). Demodulation reference signals, which are used for channel estimation for a data channel, are transmitted at different times than CS-RS however, and so some portions of the channel state information including layer indicator (LI) and channel quality indicator (CQI) can be calculated based on the demodulation reference signals, allowing a network to adapt more quickly to changing channel conditions, without having to transmit a CS-RS. Generally, precoding matrix indicator and rank indicator, which cannot be determined based on the DM-RS, don't change as often and are more stable over time, thus do not need to be calculated as frequently as the LI and CQI.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: July 6, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: SaiRamesh Nammi, Arunabha Ghosh
  • Publication number: 20210204304
    Abstract: Facilitating management of group common downlink control channels in a wireless communications system is provided herein. A method can comprise allocating, by a network device of a wireless network and comprising a processor, a group identifier to a mobile device based on a determination that the mobile device decodes a group common physical downlink control channel for wireless communications. The method can also comprise facilitating, by the network device, a transmission of data via the group common physical downlink control channel to the mobile device based on the group identifier.
    Type: Application
    Filed: March 11, 2021
    Publication date: July 1, 2021
    Inventors: SaiRamesh Nammi, Arunabha Ghosh, Ralf Bendlin
  • Publication number: 20210184817
    Abstract: The described technology is generally directed towards using demodulation reference signal (DMRS)-based channel state information (CSI) reporting in a wireless communications network with multiple transmit-receive points (TRPs). A user equipment computes joint CSI based on received DMRS data, e.g., received with downlink data traffic from two TRPs, such as co-located or backhaul connected TRPs. The DMRS-based joint CSI is reported to the multiple TRPs for use in scheduling subsequent data traffic, which can increase data throughput, and can reduce the frequency of CSI-RS reporting, increasing overall efficiency. The network can activate and deactivate DMRS-based CSI reporting.
    Type: Application
    Filed: December 13, 2019
    Publication date: June 17, 2021
    Inventors: SaiRamesh Nammi, Arunabha Ghosh
  • Publication number: 20210184791
    Abstract: Various embodiments disclosed herein provide for facilitating scheduling of uplink data using demodulation reference signal and scheduled resources. According an embodiment, a system can comprise configuring a network device with a periodic rate of specified sounding reference signals with a periodicity using radio resource control signaling. The system can further facilitate estimating channel state information associated with a channel via which the network device communicates. The system can further facilitate transmitting an uplink grant with uplink transmission parameters to set up a physical uplink shared channel, wherein the uplink transmission parameters are determined based on the channel state information. The system can further facilitate estimating scheduling parameters based on a first estimation information associated with the physical uplink shared channel.
    Type: Application
    Filed: March 1, 2021
    Publication date: June 17, 2021
    Inventors: SaiRamesh Nammi, Arunabha Ghosh
  • Patent number: 11038568
    Abstract: The technologies described herein are generally directed toward facilitating indicating frequency and time domain resources in communication systems with multiple transmission points. According to an embodiment, a system can comprise a processor and a memory that can store executable instructions that, when executed by the processor, facilitate performance of operations. The operations can include determining a first and a second transmission resource to use for transmission of a signal to a user device by, respectively, a first and a second network node. The operations can further include determining that the first and the second transmission resource comprise a same transmission resource. The operations can further include communicating, to a user equipment, a value corresponding to the first transmission resource and an indication that the first and the second transmission resource comprise the same transmission resource.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: June 15, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: SaiRamesh Nammi, Arunabha Ghosh, Ralf Bendlin
  • Patent number: 11038626
    Abstract: Facilitation of hybrid automatic repeat requests (HARQ) can comprise a system that acquires information about the capability of a mobile device. Next, the system can configure the mobile device with multiple physical uplink control channel (PUCCH) resources and a number of repetitions within a slot for each antenna port of the mobile device. A network node can then transmit a downlink control channel to the mobile device and indicate the PUCCH resources for each antenna port. Consequently, the system can then detect a HARQ acknowledgment (ACK) from the mobile device from all of the PUCCH resources.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: June 15, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventor: SaiRamesh Nammi
  • Patent number: 11032117
    Abstract: The described technology is generally directed towards having a transmitter in a wireless network generate and map reference signal sequences (e.g., for demodulation or other reference signal usage) so that the reference signal sequences are non-repetitive in a resource block. Avoiding repetition of the reference signal sequences reduces the peak-to-average power ratio in orthogonal frequency-division multiplexing (OFDM) systems. In one aspect, a transmitter device generates different reference signal sequences to avoid repetition of resource signal sequences, and maps the different reference signal sequences to appropriate (different) resource elements of a resource block. In one implementation, the different reference signal sequences can be based on different indexes of antenna ports. In an alternative implementation, the different reference signal sequences can be based on different code division multiplexing groups.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: June 8, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: SaiRamesh Nammi, Arunabha Ghosh
  • Publication number: 20210168693
    Abstract: The described technology is generally directed towards adaptively changing which transmission scheme a user equipment is to use based on a Doppler metric (e.g. Doppler frequency) as evaluated against a threshold Doppler value. A network instructs a user equipment to use a Rank-1 precoder cycling transmission scheme if the Doppler metric of user equipment is above a threshold value, or to use a closed loop MIMO transmission scheme if the user equipment has a Doppler metric below the threshold value. The network can instruct the user equipment via a suitable message, or by switching off TPMI and notifying the user equipment thereof.
    Type: Application
    Filed: February 17, 2021
    Publication date: June 3, 2021
    Inventors: SaiRamesh Nammi, Arunabha Ghosh
  • Patent number: 11025279
    Abstract: Aspects of the subject disclosure may include, for example, obtaining a received channel-encoded data block having information bits, a transmitted error-check value, and redundant code bits. The redundant code bits correspond to a channel code applied to the received channel-encoded data block prior to transmission via a communication channel. A channel code type is identified and responsive to it being systematic, the information bits and the transmitted error-check value are obtained without decoding according to the channel code. The received channel-encoded data block is checked according to the transmitted error-check value to obtain a result. Responsive to the result not indicating an error, extracting the information bits without decoding the received channel-encoded data block according to the channel code. Responsive to the result indicating an error, decoding the received channel-encoded data block according to the channel code to obtain decoded information bits. Other embodiments are disclosed.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: June 1, 2021
    Assignee: AT&T Intellectual Property 1, L.P.
    Inventors: Sairamesh Nammi, Arunabha Ghosh, Aditya Chopra, Saeed Ghassemzadeh
  • Publication number: 20210159954
    Abstract: A low complexity multiple input multiple output transmitter that transmits a single codeword per channel is disclosed herein. Instead of sending multiple codewords per channel for transmissions that support higher data layer transmissions, the transmitter can send single codewords over multiple channels in order to improve spectral efficiency over a range of signal to interference plus noise ratios. For instance, if a downlink transmission to a user equipment (UE) has a rank of 4, capable of supporting 4 data layers, instead of sending 2 or more codewords over a single downlink control channel, the transmitter can schedule multiple control channels and transmit a single codeword per channel. The transmitter can also include in the signaling to the UE that the multi-codewords are included in multiple downlink control channels.
    Type: Application
    Filed: February 4, 2021
    Publication date: May 27, 2021
    Inventors: SaiRamesh Nammi, Arunabha Ghosh
  • Publication number: 20210159955
    Abstract: Facilitating selection of demodulation reference signal port combinations in advanced networks (e.g., 4G, 5G, 6G, and beyond) is provided herein. Operations of a system can comprise evaluating a capability of a mobile device. The operations can also comprise assigning a first group of port combinations for the mobile device based on the capability of the mobile device being a first capability and a second group of port combinations for the mobile device based on the capability of the mobile device being a second capability, resulting in a port combination assignment. The port combination assignment can mitigate a peak-to-average power ratio value.
    Type: Application
    Filed: February 4, 2021
    Publication date: May 27, 2021
    Inventor: SaiRamesh Nammi
  • Publication number: 20210153240
    Abstract: Facilitating improved performance of multiple downlink control channels in advanced networks (e.g., 4G, 5G, 6G, and beyond) is provided herein. Operations of a system can comprise scheduling multiple data traffic channels for a user equipment device. Scheduling the multiple data channels can comprise scheduling a first data traffic channel of the multiple data traffic channels based on a legacy scheduling procedure and scheduling a second data traffic channel of the multiple data traffic channels based on an iterative procedure. The operations can also comprise transmitting, to the user equipment device, first information via multiple downlink control channels and transmitting, to the user equipment device, second information via the multiple data traffic channels.
    Type: Application
    Filed: January 26, 2021
    Publication date: May 20, 2021
    Inventor: SaiRamesh Nammi
  • Patent number: 11012199
    Abstract: Intelligent hybrid automatic repeat request (HARQ) feedback can better support link adaption. Thus, in addition to the traditional HARQ feedback, which is to relay acknowledgement (ACK) and negative acknowledgement (NAK) data based on a decoding result, a new state for the HARQ feedback can be represented as “ACK+”. Consequently, ACK+ can be used to indicate to the network that a modulation and coding scheme (MCS) of a current data packet is too conservative, and the user equipment (UE) is capable of supporting a more aggressive MCS.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: May 18, 2021
    Assignee: AT&T INTELLECTUAL PROPERTY I, L.P.
    Inventors: Xiaoyi Wang, Arunabha Ghosh, Salam Akoum, SaiRamesh Nammi
  • Patent number: 11012986
    Abstract: Method performed by a first communication device (101) for sending downlink information to a second communication device (102). The first communication device (101) and the second communication device (102) operate in a communications network (100). The first communication device (101) determines (702) whether or not one or more third communication devices (103) operating in the communications network (100) are sending uplink information on an adjacent carrier (142). The adjacent carrier (142) is adjacent to a carrier (141) assigned to the first communication device (101) for sending the downlink information to the second communication device (102). The first communication device (101) sends (703) the downlink information to the second communication device (102) on the carrier (141) when it has determined that the one or more third communication devices (103) are not sending uplink information on the adjacent carrier (142) to the carrier (141).
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: May 18, 2021
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Sairamesh Nammi, Dominque Everaere, Christian Hoymann